call unitedhealthcare to learn about medicare plans that may be right for you. call now. ♪ [gunfire] jon: new international fallout from the escalating crisis in syria. nato and its allies now detailing plans to defend the syria-turkey border. the crisis threatens to spill over into neighboring nations as president assad prepares chemical weapons that he might use against his own people. connor powell live from jerusalem with more. conor? >> reporter: jon, all eyes are on president bashar assad and syrian military as a senior official tells fox news that the military mixed prepared and begun loading sarin gas in bombs to be used in the deadly, deadly conflict in syria. this comes as the fighting is moving closer and closer to the syrian government strong hold in and around damascus. analysts say the death toll if sarin gas was used would be much greater than what we're seen in syria. keep in mind 40,000 people have died in the two year-long war. sarin gas is one of the most deadly chemical weapons. it has a shelf life of 60 days. now that it mixed and prepared